Journal
CHEMICAL SCIENCE
Volume 7, Issue 1, Pages 803-809Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sc03138a
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Funding
- JSPS [24350030, 26220802]
- National Natural Science Foundation of China [21174023, 21137001, 21429201]
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The reaction of a half-sandwich scandiumboryl complex 1 with CO (1 atm) afforded a novel boryl oxycarbene complex 2. The structure of 2 was characterized by H-1, C-13 and B-11 NMR, X-ray diffraction, and DFT analysis. Further reaction of 2 with CO (1 atm) yielded a phenylamido- and boryl-substituted enediolate complex 3 through C-C bond formation between CO and the carbene unit in 2 and cleavage and rearrangement of the Si-N bond in the silylene-linked Cp-amido ligand. Upon heating, insertion of the carbene atom into a methine C-H bond in the boryl ligand of 2 took place to give an alkoxide complex 4. The reactions of 2 with pyridine and 2-methylpyridine led to insertion of the carbene atom into an ortho-C-H bond of pyridine and into a methyl C-H bond of 2-methylpyridine, respectively. The reaction of 2 with ethylene yielded a borylcyclopropyloxy complex 7 through cycloaddition of the carbene atom to ethylene.
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